mirror of
https://github.com/transmission/transmission
synced 2024-12-25 17:17:31 +00:00
1106 lines
30 KiB
C
1106 lines
30 KiB
C
/******************************************************************************
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* $Id$
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*
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* Copyright (c) 2005-2006 Transmission authors and contributors
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*****************************************************************************/
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#include "transmission.h"
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#include "shared.h"
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typedef struct tr_announce_list_ptr_s tr_announce_list_ptr_t;
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struct tr_announce_list_ptr_s
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{
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tr_tracker_info_t * item;
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tr_announce_list_ptr_t * nextItem;
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};
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struct tr_tracker_s
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{
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tr_torrent_t * tor;
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char * id;
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char * trackerid;
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tr_tracker_info_t * info;
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tr_announce_list_ptr_t ** trackerAnnounceListPtr;
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#define TC_CHANGE_NO 0
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#define TC_CHANGE_NEXT 1
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#define TC_CHANGE_NONEXT 2
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#define TC_CHANGE_REDIRECT 4
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int shouldChangeAnnounce;
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int announceTier;
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int announceTierLast;
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char * redirectAddress;
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int redirectAddressLen;
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char * redirectScrapeAddress;
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int redirectScrapeAddressLen;
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char started;
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char completed;
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char stopped;
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int interval;
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int minInterval;
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int scrapeInterval;
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int seeders;
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int leechers;
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int hasManyPeers;
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int complete;
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int randOffset;
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int completelyUnconnectable;
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int allUnreachIfError;
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int lastError;
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uint64_t dateTry;
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uint64_t dateOk;
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uint64_t dateScrape;
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int lastScrapeFailed;
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int scrapeNeeded;
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tr_http_t * http;
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tr_http_t * httpScrape;
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int publicPort;
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};
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static void setAnnounce ( tr_tracker_t * tc, tr_announce_list_ptr_t * announceItem );
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static void failureAnnouncing( tr_tracker_t * tc );
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static tr_http_t * getQuery ( tr_tracker_t * tc );
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static tr_http_t * getScrapeQuery ( tr_tracker_t * tc );
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static void readAnswer ( tr_tracker_t * tc, const char *, int,
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int * peerCount, uint8_t ** peerCompact );
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static void readScrapeAnswer ( tr_tracker_t * tc, const char *, int );
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static void killHttp ( tr_http_t ** http );
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static int shouldChangePort( tr_tracker_t * tc );
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tr_tracker_t * tr_trackerInit( tr_torrent_t * tor )
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{
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tr_info_t * inf = &tor->info;
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tr_tracker_t * tc;
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tr_announce_list_ptr_t * prev, * cur;
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int ii, jj;
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tc = calloc( 1, sizeof( tr_tracker_t ) );
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tc->tor = tor;
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tc->id = tor->id;
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tc->started = 1;
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tc->shouldChangeAnnounce = TC_CHANGE_NO;
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tc->redirectAddress = NULL;
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tc->interval = 300;
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tc->scrapeInterval = 1200;
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tc->lastError = 1;
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tc->allUnreachIfError = 1;
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tc->publicPort = tor->publicPort;
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tc->trackerAnnounceListPtr = calloc( sizeof( int ), inf->trackerTiers );
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for( ii = 0; ii < inf->trackerTiers; ii++ )
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{
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prev = NULL;
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for( jj = 0; jj < inf->trackerList[ii].count; jj++ )
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{
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cur = calloc( sizeof( tr_announce_list_ptr_t ), 1 );
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cur->item = &inf->trackerList[ii].list[jj];
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if( NULL == prev )
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{
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tc->trackerAnnounceListPtr[ii] = cur;
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}
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else
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{
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prev->nextItem = cur;
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}
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prev = cur;
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}
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}
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setAnnounce( tc, tc->trackerAnnounceListPtr[0] );
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return tc;
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}
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static void setAnnounce( tr_tracker_t * tc, tr_announce_list_ptr_t * announcePtr )
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{
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tc->info = announcePtr->item;
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/* Needs a new scrape */
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tc->seeders = -1;
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tc->leechers = -1;
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tc->complete = -1;
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tc->dateScrape = 0;
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}
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static void failureAnnouncing( tr_tracker_t * tc )
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{
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tr_info_t * inf = &tc->tor->info;
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tc->shouldChangeAnnounce = tc->announceTier + 1 < inf->trackerTiers
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|| tc->announceTierLast + 1 < inf->trackerList[tc->announceTier].count
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? TC_CHANGE_NEXT : TC_CHANGE_NONEXT;
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if( tc->shouldChangeAnnounce == TC_CHANGE_NONEXT )
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{
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tc->completelyUnconnectable = 1;
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}
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}
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static int shouldConnect( tr_tracker_t * tc )
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{
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tr_torrent_t * tor = tc->tor;
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uint64_t now;
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/* Last tracker failed, try next */
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if( tc->shouldChangeAnnounce == TC_CHANGE_NEXT
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|| tc->shouldChangeAnnounce == TC_CHANGE_REDIRECT )
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{
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return 1;
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}
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now = tr_date();
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/* If last was an error and it should not change trackers, then all must have been errors */
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if( tc->lastError )
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{
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/* Unreachable trackers, wait 10 seconds + random value before trying again */
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if( tc->allUnreachIfError )
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{
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if( now < tc->dateTry + tc->randOffset + 10000 )
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{
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return 0;
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}
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}
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/* The tracker rejected us (like 4XX code, unauthorized IP...),
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don't hammer it - we'll probably get the same answer next time anyway */
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else
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{
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if( now < tc->dateTry + 1000 * tc->interval + tc->randOffset )
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{
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return 0;
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}
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else
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{
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tc->allUnreachIfError = 1;
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}
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}
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}
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/* Do we need to send an event? */
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if( tc->started || tc->completed || tc->stopped || shouldChangePort( tc ) )
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{
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return 1;
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}
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/* Should we try and get more peers? */
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if( now > tc->dateOk + 1000 * tc->interval + tc->randOffset )
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{
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return 1;
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}
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/* If there is quite a lot of people on this torrent, stress
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the tracker a bit until we get a decent number of peers */
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if( tc->hasManyPeers && !tr_cpIsSeeding( tor->completion ) )
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{
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/* reannounce in 10 seconds if we have less than 5 peers */
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if( tor->peerCount < 5 )
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{
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if( now > tc->dateOk + 1000 * MAX( 10, tc->minInterval ) )
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{
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return 1;
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}
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}
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/* reannounce in 20 seconds if we have less than 10 peers */
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else if( tor->peerCount < 10 )
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{
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if( now > tc->dateOk + 1000 * MAX( 20, tc->minInterval ) )
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{
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return 1;
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}
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}
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/* reannounce in 30 seconds if we have less than 15 peers */
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else if( tor->peerCount < 15 )
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{
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if( now > tc->dateOk + 1000 * MAX( 30, tc->minInterval ) )
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{
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return 1;
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}
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}
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}
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return 0;
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}
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static int shouldScrape( tr_tracker_t * tc )
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{
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uint64_t now, interval;
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/* in process of changing tracker or scrape not supported */
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if( tc->shouldChangeAnnounce != TC_CHANGE_NO ||
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NULL == tc->info->scrape || tc->stopped )
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{
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return 0;
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}
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now = tr_date();
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interval = 1000 * MAX( tc->scrapeInterval, 600 );
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/* scrape more often if needed */
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if( tc->scrapeNeeded || tc->lastScrapeFailed )
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{
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interval /= 2;
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}
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return now > tc->dateScrape + interval;
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}
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void tr_trackerAnnouncePulse( tr_tracker_t * tc, int * peerCount,
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uint8_t ** peerCompact, int manual )
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{
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tr_torrent_t * tor = tc->tor;
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tr_info_t * inf = &tor->info;
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const char * data;
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char * address, * announce;
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int len, i, port;
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tr_announce_list_ptr_t * announcePtr, * prevAnnouncePtr;
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*peerCount = 0;
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*peerCompact = NULL;
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if( ( NULL == tc->http ) && ( manual || shouldConnect( tc ) ) )
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{
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if( manual )
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{
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tc->allUnreachIfError = 0;
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}
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tc->completelyUnconnectable = 0;
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tc->randOffset = tr_rand( 60000 );
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tc->dateTry = tr_date();
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/* Use redirected address */
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if( tc->shouldChangeAnnounce == TC_CHANGE_REDIRECT )
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{
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if( !tr_httpParseUrl( tc->redirectAddress, tc->redirectAddressLen,
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&address, &port, &announce ) )
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{
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tr_err( "Tracker: redirected URL: %s:%d", address, port );
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tc->http = tr_httpClient( TR_HTTP_GET, address, port, "%s", announce );
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free( address );
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free( announce );
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}
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free( tc->redirectAddress );
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tc->redirectAddress = NULL;
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}
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else
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{
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/* Need to change to next address in list */
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if( tc->shouldChangeAnnounce == TC_CHANGE_NEXT )
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{
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tr_inf( "Tracker: failed to connect to %s, trying next",
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tc->info->address );
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if( tc->announceTierLast + 1 < inf->trackerList[tc->announceTier].count )
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{
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tc->announceTierLast++;
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announcePtr = tc->trackerAnnounceListPtr[tc->announceTier];
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for( i = 0; i < tc->announceTierLast; i++ )
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{
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announcePtr = announcePtr->nextItem;
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}
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}
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else
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{
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tc->announceTierLast = 0;
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tc->announceTier++;
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announcePtr = tc->trackerAnnounceListPtr[tc->announceTier];
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}
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tr_inf( "Tracker: tracker address set to %s", tc->trackerAnnounceListPtr[tc->announceTier]->item->address );
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setAnnounce( tc, announcePtr );
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}
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/* Need to change to first in list */
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else if( tc->announceTier != 0 || tc->announceTierLast != 0 )
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{
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/* Check if the last announce was successful and wasn't the first in the sublist */
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if( tc->shouldChangeAnnounce == TC_CHANGE_NO && tc->announceTierLast != 0 )
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{
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announcePtr = tc->trackerAnnounceListPtr[tc->announceTier];
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prevAnnouncePtr = NULL;
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for( i = 0; i < tc->announceTierLast; i++ )
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{
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prevAnnouncePtr = announcePtr;
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announcePtr = announcePtr->nextItem;
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}
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/* Move address to front of tier in announce list */
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prevAnnouncePtr->nextItem = announcePtr->nextItem;
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announcePtr->nextItem = tc->trackerAnnounceListPtr[tc->announceTier];
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tc->trackerAnnounceListPtr[tc->announceTier] = announcePtr;
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}
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setAnnounce( tc, tc->trackerAnnounceListPtr[0] );
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tc->announceTier = 0;
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tc->announceTierLast = 0;
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}
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tc->http = getQuery( tc );
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tr_inf( "Tracker: connecting to %s:%d (%s)",
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tc->info->address, tc->info->port,
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tc->started ? "sending 'started'" :
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( tc->completed ? "sending 'completed'" :
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( tc->stopped ? "sending 'stopped'" :
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( shouldChangePort( tc ) ? "sending 'stopped' to change port" :
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"getting peers" ) ) ) );
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}
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tc->shouldChangeAnnounce = TC_CHANGE_NO;
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}
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if( NULL != tc->http )
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{
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switch( tr_httpPulse( tc->http, &data, &len ) )
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{
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case TR_NET_WAIT:
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break;
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case TR_NET_ERROR:
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killHttp( &tc->http );
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tc->dateTry = tr_date();
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failureAnnouncing( tc );
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tc->lastError = 1;
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break;
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case TR_NET_OK:
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readAnswer( tc, data, len, peerCount, peerCompact );
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killHttp( &tc->http );
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break;
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}
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}
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if( ( NULL == tc->httpScrape ) && shouldScrape( tc ) )
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{
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tc->dateScrape = tr_date();
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if ( tc->redirectScrapeAddress != NULL )
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{
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/* Use redirected address */
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if( !tr_httpParseUrl( tc->redirectScrapeAddress, tc->redirectScrapeAddressLen,
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&address, &port, &announce ) )
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{
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tr_err( "Scrape: redirected URL: %s:%d", address, port );
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tc->httpScrape = tr_httpClient( TR_HTTP_GET, address, port, "%s", announce );
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free( address );
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free( announce );
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}
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free( tc->redirectScrapeAddress );
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tc->redirectScrapeAddress = NULL;
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}
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else
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{
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tc->httpScrape = getScrapeQuery( tc );
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tr_inf( "Scrape: sent HTTP request to %s:%d%s",
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tc->info->address, tc->info->port, tc->info->scrape );
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}
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}
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if( NULL != tc->httpScrape )
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{
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switch( tr_httpPulse( tc->httpScrape, &data, &len ) )
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{
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case TR_NET_WAIT:
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break;
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case TR_NET_ERROR:
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killHttp( &tc->httpScrape );
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tc->lastScrapeFailed = 1;
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break;
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case TR_NET_OK:
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readScrapeAnswer( tc, data, len );
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killHttp( &tc->httpScrape );
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break;
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}
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}
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return;
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}
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void tr_trackerCompleted( tr_tracker_t * tc )
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{
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tc->started = 0;
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tc->completed = 1;
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tc->stopped = 0;
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}
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void tr_trackerStopped( tr_tracker_t * tc )
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{
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/* If we are already sending a query at the moment, we need to
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reconnect */
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killHttp( &tc->http );
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tc->started = 0;
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tc->completed = 0;
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tc->stopped = 1;
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/* Even if we have connected recently, reconnect right now */
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tc->dateTry = 0;
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}
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void tr_trackerClose( tr_tracker_t * tc )
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{
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tr_torrent_t * tor = tc->tor;
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tr_info_t * inf = &tor->info;
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tr_announce_list_ptr_t * cur, * curFree;
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int ii;
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killHttp( &tc->http );
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killHttp( &tc->httpScrape );
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for( ii = 0; ii < inf->trackerTiers; ii++ )
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{
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for( cur = tc->trackerAnnounceListPtr[ii]; cur; )
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{
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curFree = cur;
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cur = cur->nextItem;
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free( curFree );
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}
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}
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free( tc->trackerAnnounceListPtr );
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free( tc->trackerid );
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free( tc );
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}
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static tr_http_t * getQuery( tr_tracker_t * tc )
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{
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tr_torrent_t * tor = tc->tor;
|
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char * event, * trackerid, * idparam;
|
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uint64_t left;
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uint64_t down;
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uint64_t up;
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char start;
|
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int numwant = 50;
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down = tor->downloadedCur;
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up = tor->uploadedCur;
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if( tc->started )
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{
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event = "&event=started";
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down = 0;
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up = 0;
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if( shouldChangePort( tc ) )
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{
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tc->publicPort = tor->publicPort;
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}
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}
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else if( tc->completed )
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{
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event = "&event=completed";
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}
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else if( tc->stopped || shouldChangePort( tc ) )
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{
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event = "&event=stopped";
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numwant = 0;
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}
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else
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{
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event = "";
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}
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if( NULL == tc->trackerid )
|
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{
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trackerid = "";
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idparam = "";
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}
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else
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{
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trackerid = tc->trackerid;
|
|
idparam = "&trackerid=";
|
|
}
|
|
|
|
start = ( strchr( tc->info->announce, '?' ) ? '&' : '?' );
|
|
left = tr_cpLeftBytes( tor->completion );
|
|
|
|
return tr_httpClient( TR_HTTP_GET, tc->info->address, tc->info->port,
|
|
"%s%c"
|
|
"info_hash=%s&"
|
|
"peer_id=%s&"
|
|
"port=%d&"
|
|
"uploaded=%"PRIu64"&"
|
|
"downloaded=%"PRIu64"&"
|
|
"left=%"PRIu64"&"
|
|
"compact=1&"
|
|
"numwant=%d&"
|
|
"key=%s"
|
|
"%s%s"
|
|
"%s",
|
|
tc->info->announce, start, tor->escapedHashString,
|
|
tc->id, tc->publicPort, up, down, left, numwant,
|
|
tor->key, idparam, trackerid, event );
|
|
}
|
|
|
|
static tr_http_t * getScrapeQuery( tr_tracker_t * tc )
|
|
{
|
|
tr_torrent_t * tor = tc->tor;
|
|
char start;
|
|
|
|
start = ( strchr( tc->info->scrape, '?' ) ? '&' : '?' );
|
|
|
|
return tr_httpClient( TR_HTTP_GET, tc->info->address, tc->info->port,
|
|
"%s%c"
|
|
"info_hash=%s",
|
|
tc->info->scrape, start, tor->escapedHashString );
|
|
}
|
|
|
|
static void readAnswer( tr_tracker_t * tc, const char * data, int len,
|
|
int * _peerCount, uint8_t ** _peerCompact )
|
|
{
|
|
tr_torrent_t * tor = tc->tor;
|
|
int i;
|
|
int code;
|
|
benc_val_t beAll;
|
|
benc_val_t * bePeers, * beFoo;
|
|
const uint8_t * body;
|
|
int bodylen, shouldfree, scrapeNeeded;
|
|
char * address;
|
|
int peerCount;
|
|
uint8_t * peerCompact;
|
|
|
|
*_peerCount = peerCount = 0;
|
|
*_peerCompact = peerCompact = NULL;
|
|
|
|
tc->dateTry = tr_date();
|
|
code = tr_httpResponseCode( data, len );
|
|
|
|
if( 0 > code )
|
|
{
|
|
/* We don't have a valid HTTP status line */
|
|
tr_inf( "Tracker: invalid HTTP status line" );
|
|
tc->lastError = 1;
|
|
failureAnnouncing( tc );
|
|
return;
|
|
}
|
|
|
|
if( code == 301 || code == 302 )
|
|
{
|
|
tr_http_header_t hdr[] = { { "Location", NULL, 0 }, { NULL, NULL, 0 } };
|
|
|
|
tr_err( "Tracker: HTTP status code: %i", code );
|
|
|
|
tr_httpParse( data, len, hdr );
|
|
|
|
address = calloc( sizeof( char ), hdr->len+1 );
|
|
snprintf( address, hdr->len+1, "%s", hdr->data );
|
|
|
|
tc->shouldChangeAnnounce = TC_CHANGE_REDIRECT;
|
|
tc->redirectAddress = address;
|
|
tc->redirectAddressLen = hdr->len;
|
|
|
|
return;
|
|
}
|
|
|
|
if( !TR_HTTP_STATUS_OK( code ) )
|
|
{
|
|
/* we didn't get a 2xx status code */
|
|
tr_err( "Tracker: invalid HTTP status code: %i", code );
|
|
tc->lastError = 1;
|
|
tc->allUnreachIfError = 0;
|
|
failureAnnouncing( tc );
|
|
return;
|
|
}
|
|
|
|
/* find the end of the http headers */
|
|
body = (uint8_t *) tr_httpParse( data, len, NULL );
|
|
if( NULL == body )
|
|
{
|
|
tr_err( "Tracker: could not find end of HTTP headers" );
|
|
tc->lastError = 1;
|
|
failureAnnouncing( tc );
|
|
return;
|
|
}
|
|
bodylen = len - ( body - (const uint8_t*)data );
|
|
|
|
/* Find and load the dictionary */
|
|
shouldfree = 0;
|
|
for( i = 0; i < bodylen; i++ )
|
|
{
|
|
if( !tr_bencLoad( &body[i], bodylen - i, &beAll, NULL ) )
|
|
{
|
|
shouldfree = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if( i >= bodylen )
|
|
{
|
|
if( tc->stopped || shouldChangePort( tc ) )
|
|
{
|
|
tc->lastError = 0;
|
|
goto nodict;
|
|
}
|
|
tr_err( "Tracker: no valid dictionary found in answer" );
|
|
tc->lastError = 1;
|
|
tc->allUnreachIfError = 0;
|
|
failureAnnouncing( tc );
|
|
return;
|
|
}
|
|
|
|
// tr_bencPrint( &beAll );
|
|
|
|
if( ( bePeers = tr_bencDictFind( &beAll, "failure reason" ) ) )
|
|
{
|
|
tr_err( "Tracker: Error - %s", bePeers->val.s.s );
|
|
tor->error = TR_ERROR_TC_ERROR;
|
|
snprintf( tor->errorString, sizeof( tor->errorString ),
|
|
"%s", bePeers->val.s.s );
|
|
tc->lastError = 1;
|
|
tc->allUnreachIfError = 0;
|
|
failureAnnouncing( tc );
|
|
goto cleanup;
|
|
}
|
|
else if( ( bePeers = tr_bencDictFind( &beAll, "warning message" ) ) )
|
|
{
|
|
tr_err( "Tracker: Warning - %s", bePeers->val.s.s );
|
|
tor->error = TR_ERROR_TC_WARNING;
|
|
snprintf( tor->errorString, sizeof( tor->errorString ),
|
|
"%s", bePeers->val.s.s );
|
|
}
|
|
else if( tor->error & TR_ERROR_TC_MASK )
|
|
{
|
|
tor->error = TR_OK;
|
|
}
|
|
|
|
tc->lastError = 0;
|
|
tc->allUnreachIfError = 0;
|
|
|
|
/* Get the tracker interval, force to between
|
|
10 sec and 5 mins */
|
|
beFoo = tr_bencDictFind( &beAll, "interval" );
|
|
if( !beFoo || TYPE_INT != beFoo->type )
|
|
{
|
|
tr_err( "Tracker: no 'interval' field" );
|
|
goto cleanup;
|
|
}
|
|
|
|
tc->interval = beFoo->val.i;
|
|
tr_inf( "Tracker: interval = %d seconds", tc->interval );
|
|
|
|
tc->interval = MIN( tc->interval, 300 );
|
|
tc->interval = MAX( 10, tc->interval );
|
|
|
|
/* Get the tracker minimum interval, force to between
|
|
10 sec and 5 mins */
|
|
beFoo = tr_bencDictFind( &beAll, "min interval" );
|
|
if( beFoo && TYPE_INT == beFoo->type )
|
|
{
|
|
tc->minInterval = beFoo->val.i;
|
|
tr_inf( "Tracker: min interval = %d seconds", tc->minInterval );
|
|
|
|
tc->minInterval = MIN( tc->minInterval, 300 );
|
|
tc->minInterval = MAX( 10, tc->minInterval );
|
|
|
|
if( tc->interval < tc->minInterval )
|
|
{
|
|
tc->interval = tc->minInterval;
|
|
tr_inf( "Tracker: 'interval' less than 'min interval', "
|
|
"using 'min interval'" );
|
|
}
|
|
}
|
|
else
|
|
{
|
|
tc->minInterval = 0;
|
|
tr_inf( "Tracker: no 'min interval' field" );
|
|
}
|
|
|
|
scrapeNeeded = 0;
|
|
beFoo = tr_bencDictFind( &beAll, "complete" );
|
|
if( beFoo && TYPE_INT == beFoo->type )
|
|
{
|
|
tc->seeders = beFoo->val.i;
|
|
}
|
|
else
|
|
{
|
|
scrapeNeeded = 1;
|
|
}
|
|
|
|
beFoo = tr_bencDictFind( &beAll, "incomplete" );
|
|
if( beFoo && TYPE_INT == beFoo->type )
|
|
{
|
|
tc->leechers = beFoo->val.i;
|
|
}
|
|
else
|
|
{
|
|
scrapeNeeded = 1;
|
|
}
|
|
|
|
tc->scrapeNeeded = scrapeNeeded;
|
|
if( !scrapeNeeded )
|
|
{
|
|
tc->hasManyPeers = ( tc->seeders + tc->leechers >= 50 );
|
|
}
|
|
|
|
beFoo = tr_bencDictFind( &beAll, "tracker id" );
|
|
if( beFoo )
|
|
{
|
|
free( tc->trackerid );
|
|
tc->trackerid = strdup( beFoo->val.s.s );
|
|
tr_inf( "Tracker: tracker id = %s", tc->trackerid );
|
|
}
|
|
|
|
bePeers = tr_bencDictFind( &beAll, "peers" );
|
|
if( !bePeers )
|
|
{
|
|
if( tc->stopped || shouldChangePort( tc ) )
|
|
{
|
|
goto nodict;
|
|
}
|
|
tr_err( "Tracker: no \"peers\" field" );
|
|
failureAnnouncing( tc );
|
|
goto cleanup;
|
|
}
|
|
|
|
if( bePeers->type & TYPE_LIST )
|
|
{
|
|
/* Original protocol */
|
|
if( bePeers->val.l.count > 0 )
|
|
{
|
|
struct in_addr addr;
|
|
in_port_t port;
|
|
|
|
peerCount = 0;
|
|
peerCompact = malloc( 6 * bePeers->val.l.count );
|
|
|
|
/* Convert to compact form */
|
|
for( i = 0; i < bePeers->val.l.count; i++ )
|
|
{
|
|
if( !( beFoo = tr_bencDictFind(
|
|
&bePeers->val.l.vals[i], "ip" ) ) )
|
|
continue;
|
|
if( tr_netResolve( beFoo->val.s.s, &addr ) )
|
|
continue;
|
|
memcpy( &peerCompact[6 * peerCount], &addr, 4 );
|
|
|
|
if( !( beFoo = tr_bencDictFind(
|
|
&bePeers->val.l.vals[i], "port" ) ) )
|
|
continue;
|
|
port = htons( beFoo->val.i );
|
|
memcpy( &peerCompact[6 * peerCount + 4], &port, 2 );
|
|
|
|
peerCount++;
|
|
}
|
|
}
|
|
}
|
|
else if( bePeers->type & TYPE_STR )
|
|
{
|
|
/* "Compact" extension */
|
|
if( bePeers->val.s.i >= 6 )
|
|
{
|
|
peerCount = bePeers->val.s.i / 6;
|
|
peerCompact = malloc( bePeers->val.s.i );
|
|
memcpy( peerCompact, bePeers->val.s.s, bePeers->val.s.i );
|
|
}
|
|
}
|
|
|
|
if( peerCount > 0 )
|
|
{
|
|
tr_inf( "Tracker: got %d peers", peerCount );
|
|
if( peerCount >= 50 )
|
|
{
|
|
tc->hasManyPeers = 1;
|
|
}
|
|
*_peerCount = peerCount;
|
|
*_peerCompact = peerCompact;
|
|
}
|
|
|
|
nodict:
|
|
/* Success */
|
|
tc->started = 0;
|
|
tc->completed = 0;
|
|
tc->dateOk = tr_date();
|
|
|
|
if( tc->stopped )
|
|
{
|
|
tor->status = TR_STATUS_STOPPED;
|
|
tc->stopped = 0;
|
|
}
|
|
else if( shouldChangePort( tc ) )
|
|
{
|
|
tc->started = 1;
|
|
}
|
|
|
|
cleanup:
|
|
if( shouldfree )
|
|
{
|
|
tr_bencFree( &beAll );
|
|
}
|
|
}
|
|
|
|
static void readScrapeAnswer( tr_tracker_t * tc, const char * data, int len )
|
|
{
|
|
int code;
|
|
const uint8_t * body;
|
|
int bodylen, ii;
|
|
benc_val_t scrape, * val1, * val2;
|
|
char * address;
|
|
|
|
code = tr_httpResponseCode( data, len );
|
|
if( 0 > code )
|
|
{
|
|
/* We don't have a valid HTTP status line */
|
|
tr_inf( "Scrape: invalid HTTP status line" );
|
|
tc->lastScrapeFailed = 1;
|
|
return;
|
|
}
|
|
|
|
if( code == 301 || code == 302 )
|
|
{
|
|
tr_http_header_t hdr[] = { { "Location", NULL, 0 }, { NULL, NULL, 0 } };
|
|
|
|
tr_err( "Scrape: HTTP status code: %i", code );
|
|
|
|
tr_httpParse( data, len, hdr );
|
|
|
|
address = calloc( sizeof( char ), hdr->len+1 );
|
|
snprintf( address, hdr->len+1, "%s", hdr->data );
|
|
|
|
/* Needs a new scrape */
|
|
tc->dateScrape = 0;
|
|
|
|
tc->redirectScrapeAddress = address;
|
|
tc->redirectScrapeAddressLen = hdr->len;
|
|
|
|
return;
|
|
}
|
|
|
|
if( !TR_HTTP_STATUS_OK( code ) )
|
|
{
|
|
/* we didn't get a 2xx status code */
|
|
tr_err( "Scrape: invalid HTTP status code: %i", code );
|
|
if( TR_HTTP_STATUS_FAIL_CLIENT( code ) )
|
|
{
|
|
free( tc->info->scrape );
|
|
tc->info->scrape = NULL;
|
|
}
|
|
tc->lastScrapeFailed = 1;
|
|
return;
|
|
}
|
|
|
|
/* find the end of the http headers */
|
|
body = (uint8_t *) tr_httpParse( data, len, NULL );
|
|
if( NULL == body )
|
|
{
|
|
tr_err( "Scrape: could not find end of HTTP headers" );
|
|
tc->lastScrapeFailed = 1;
|
|
return;
|
|
}
|
|
|
|
tc->lastScrapeFailed = 0;
|
|
bodylen = len - ( body - (const uint8_t*)data );
|
|
|
|
for( ii = 0; ii < bodylen; ii++ )
|
|
{
|
|
if( !tr_bencLoad( body + ii, bodylen - ii, &scrape, NULL ) )
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
if( ii >= bodylen )
|
|
{
|
|
return;
|
|
}
|
|
|
|
val1 = tr_bencDictFind( &scrape, "files" );
|
|
if( !val1 || val1->type != TYPE_DICT || val1->val.l.count < 1 )
|
|
{
|
|
tr_bencFree( &scrape );
|
|
return;
|
|
}
|
|
val1 = &val1->val.l.vals[1];
|
|
|
|
val2 = tr_bencDictFind( val1, "complete" );
|
|
if( !val2 )
|
|
{
|
|
tr_bencFree( &scrape );
|
|
return;
|
|
}
|
|
tc->seeders = val2->val.i;
|
|
|
|
val2 = tr_bencDictFind( val1, "incomplete" );
|
|
if( !val2 )
|
|
{
|
|
tr_bencFree( &scrape );
|
|
return;
|
|
}
|
|
tc->leechers = val2->val.i;
|
|
|
|
val2 = tr_bencDictFind( val1, "downloaded" );
|
|
if( !val2 )
|
|
{
|
|
tr_bencFree( &scrape );
|
|
return;
|
|
}
|
|
tc->complete = val2->val.i;
|
|
|
|
val2 = tr_bencDictFind( &scrape, "flags" );
|
|
if( val2 )
|
|
{
|
|
val2 = tr_bencDictFind( val2, "min_request_interval" );
|
|
if( val2 )
|
|
{
|
|
tc->scrapeInterval = val2->val.i;
|
|
tr_inf( "Scrape: min_request_interval = %d seconds", tc->scrapeInterval );
|
|
}
|
|
}
|
|
|
|
tc->hasManyPeers = ( tc->seeders + tc->leechers >= 50 );
|
|
|
|
tr_bencFree( &scrape );
|
|
}
|
|
|
|
int tr_trackerSeeders( tr_tracker_t * tc )
|
|
{
|
|
if( !tc )
|
|
{
|
|
return -1;
|
|
}
|
|
return tc->seeders;
|
|
}
|
|
|
|
int tr_trackerLeechers( tr_tracker_t * tc )
|
|
{
|
|
if( !tc )
|
|
{
|
|
return -1;
|
|
}
|
|
return tc->leechers;
|
|
}
|
|
|
|
int tr_trackerDownloaded( tr_tracker_t * tc )
|
|
{
|
|
if( !tc )
|
|
{
|
|
return -1;
|
|
}
|
|
return tc->complete;
|
|
}
|
|
|
|
tr_tracker_info_t * tr_trackerGet( tr_tracker_t * tc )
|
|
{
|
|
if( !tc )
|
|
{
|
|
return NULL;
|
|
}
|
|
return tc->info;
|
|
}
|
|
|
|
int tr_trackerCannotConnect( tr_tracker_t * tc )
|
|
{
|
|
if( !tc )
|
|
{
|
|
return 0;
|
|
}
|
|
return tc->completelyUnconnectable;
|
|
}
|
|
|
|
/* Blocking version */
|
|
int tr_trackerScrape( tr_torrent_t * tor, int * s, int * l, int * d )
|
|
{
|
|
tr_tracker_t * tc;
|
|
tr_http_t * http;
|
|
const char * data;
|
|
int len;
|
|
int ret;
|
|
|
|
tc = tr_trackerInit( tor );
|
|
|
|
if( NULL == tc->info->scrape )
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
http = getScrapeQuery( tc );
|
|
|
|
for( data = NULL; !data; tr_wait( 10 ) )
|
|
{
|
|
switch( tr_httpPulse( http, &data, &len ) )
|
|
{
|
|
case TR_NET_WAIT:
|
|
break;
|
|
|
|
case TR_NET_ERROR:
|
|
goto scrapeDone;
|
|
|
|
case TR_NET_OK:
|
|
readScrapeAnswer( tc, data, len );
|
|
goto scrapeDone;
|
|
}
|
|
}
|
|
|
|
scrapeDone:
|
|
tr_httpClose( http );
|
|
|
|
ret = 1;
|
|
if( tc->seeders > -1 && tc->leechers > -1 && tc->complete > -1 )
|
|
{
|
|
*s = tc->seeders;
|
|
*l = tc->leechers;
|
|
*d = tc->complete;
|
|
ret = 0;
|
|
}
|
|
|
|
tr_trackerClose( tc );
|
|
return ret;
|
|
}
|
|
|
|
static void killHttp( tr_http_t ** http )
|
|
{
|
|
if( NULL != *http )
|
|
{
|
|
tr_httpClose( *http );
|
|
*http = NULL;
|
|
}
|
|
}
|
|
|
|
static int shouldChangePort( tr_tracker_t * tc )
|
|
{
|
|
tr_torrent_t * tor = tc->tor;
|
|
|
|
return ( tor->publicPort != tc->publicPort );
|
|
}
|